Alpha Decay of ¹⁰⁹I and the Implications for the Rapid-Proton Capture Process

Conference · Mon Dec 01 00:00:00 EST 2008

OSTI ID:946106

Mazzocchi, C ^[1]; Grzywacz, Robert ^[2]; Liddick, S N ^[3]; Rykaczewski, Krzysztof Piotr ^[4]; Shatz, H ^[3]; Batchelder, J C ^[5]; Bingham, C R ^[1]; Cartegni, L ^[2]; Gross, Carl J ^[4]; Hamilton, J H ^[6]; Hwang, J K ^[6]; Ilyushkin, S ^[7]; Korgul, A ^[1]; Krolas, W ^[8]; Li, K ^[9]; Page, R D ^[10]; Winger, J A ^[1]

---

1. University of Tennessee, Knoxville (UTK)
2. University of Tennessee
3. Michigan State University, East Lansing
4. ORNL
5. Oak Ridge Associated Universities (ORAU)
6. Vanderbilt University
7. Mississippi State University (MSU)
8. University of Warsaw
9. Joint Institute for Heavy Ion Research, Oak Ridge
10. University of Liverpool

In an experiment at the Recoil Mass Spectrometer of the HRIBF at ORNL the alpha decay branch of {sup 109}I was discovered. The measurement of its decay energy allowed for the indirect determination of the proton separation energy in the daughter nucleus {sup 105}Sb. The deduced S{sub p}({sup 105}Sb) = -356(22) keV is about 130 keV larger than the previously claimed value. The consequences of this measurement for the astrophysical rp-process will be discussed.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 946106
• Resource Relation: Conference: Tenth International Symposium on Nuclei in the Cosmos (NIC-X), Mackinac Island, MI, USA, 20080727, 20080801
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ALPHA DECAY
BINDING ENERGY
DECAY
MASS SPECTROMETERS
NUCLEI
ORNL
PROTONS
UNIVERSE